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Flow Chart of Troubleshooting
9-47
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9-2-5. Abnormal WCDMA1900 Tx Operation
TX ON
Target
PWR=23dBm
1. Check
FEM Ant
Resolder RFS100,
L103, C101
F100 PIN20
≥
10dBm
Check Antenna
Switch Control
YES
2. Check
FEM In/Out
Check F100
PIN15=H,PIN13=H
PIN14=L,PIN12=L
NO
F100 PIN16
≥
8dBm
NO
YES
Resolder or Change
F100
3. Check
Duplexer Ant
NO
YES
Resolder
C145,L136
DUF100 PIN6
≥
5dBm
YES
4 .Check
Coupler Input
NO
Resolder or change
CPL100, R118, R112,
R114, R115
CPL100 PIN2
≥
5dBm
YES
5. Check
PAM Output
NO
Resolder or Change
C153, C1105
PAM102 PIN8
≥
-15dBm
YES
6. Check
Transceiver Input
NO
Resolder or Change
PAM102, F101, L115,
C151,C115
RFT100 PIN59
≥
-20dBm
YES
NO
Check RFT100,
UCP300
END
Содержание GT-I8910
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